CVE-2022-26183 in PNPM
Summary
by MITRE • 03/22/2022
PNPM v6.15.1 and below was discovered to contain an untrusted search path which causes the application to behave in unexpected ways when users execute PNPM commands in a directory containing malicious content. This vulnerability occurs when the application is ran on Windows OS.
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Analysis
by VulDB Data Team • 03/24/2026
The vulnerability identified as CVE-2022-26183 affects PNPM versions 6.15.1 and earlier, specifically on Windows operating systems where an untrusted search path issue exists within the package manager's execution behavior. This flaw represents a significant security concern as it allows attackers to manipulate the application's execution flow through malicious content placed in directories where PNPM commands are executed. The vulnerability stems from PNPM's improper handling of the PATH environment variable and its search mechanisms when resolving dependencies and executing commands in user-controlled directories. When users run PNPM commands in directories containing malicious files or scripts, the application may inadvertently execute these unauthorized components instead of the intended legitimate files.
The technical implementation of this vulnerability involves PNPM's failure to properly sanitize or validate the execution environment when processing package installations or command execution. This behavior aligns with CWE-427 Uncontrolled Search Path Element, which describes situations where applications search for files in directories specified by untrusted input or environment variables without proper validation. The vulnerability is particularly dangerous on Windows systems due to the operating system's file execution semantics and the way it resolves executable paths. Attackers can exploit this by placing malicious executables or scripts with the same names as legitimate PNPM components in directories that appear earlier in the system's search path, causing the application to execute the malicious content instead of the intended files.
The operational impact of CVE-2022-26183 extends beyond simple privilege escalation or code execution as it fundamentally compromises the integrity of the package management process. When users execute PNPM commands in compromised directories, the application may download and execute malicious code, potentially leading to full system compromise, data exfiltration, or persistent backdoor installation. This vulnerability affects the entire supply chain security model as it allows attackers to inject malicious code into the dependency resolution process, undermining trust in package installations. The attack vector is particularly insidious because it requires no special privileges beyond normal user access and can be triggered by simply executing common PNPM commands in affected directories.
Mitigation strategies for this vulnerability should focus on immediate version upgrades to PNPM 6.15.2 or later, which contain patches addressing the untrusted search path issue. Organizations should implement strict directory access controls and audit practices to prevent execution of PNPM commands in untrusted directories. System administrators should consider implementing application whitelisting policies that restrict execution of package managers in potentially compromised environments. The vulnerability demonstrates the importance of proper environment variable handling and search path validation as outlined in the software security principles of the MITRE ATT&CK framework, specifically targeting techniques related to privilege escalation and execution through trusted applications. Additionally, organizations should conduct security audits of their development environments to ensure that no malicious content exists in directories where package managers are executed, and implement automated scanning tools to detect potentially compromised package repositories or local directories.